tracing: Remove definition of trace_*_rcuidle()

Commit Message

Steven Rostedt Oct. 3, 2024, 9:30 p.m. UTC

From: Steven Rostedt <[e-mail]>

The trace_*_rcuidle() variant of a tracepoint was to handle places where a
tracepoint was located but RCU was not "watching". All those locations
have been removed, and RCU should be watching where all tracepoints are
located. We can now remove the trace_*_rcuidle() variant.

Signed-off-by: Steven Rostedt (Google) <[e-mail]>
---
 include/linux/tracepoint.h        | 17 -----------------
 include/trace/events/preemptirq.h |  8 --------
 kernel/trace/trace_preemptirq.c   | 26 ++++++--------------------
 scripts/tags.sh                   |  2 --
 4 files changed, 6 insertions(+), 47 deletions(-)

Patch

diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 93a9f3070b48..5b5bddb1d6f8 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -244,19 +244,6 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 		preempt_enable_notrace();				\
 	} while (0)
 
-#ifndef MODULE
-#define __DECLARE_TRACE_RCU(name, proto, args, cond)			\
-	static inline void trace_##name##_rcuidle(proto)		\
-	{								\
-		if (static_key_false(&__tracepoint_##name.key))		\
-			__DO_TRACE(name,				\
-				TP_ARGS(args),				\
-				TP_CONDITION(cond), 1);			\
-	}
-#else
-#define __DECLARE_TRACE_RCU(name, proto, args, cond)
-#endif
-
 /*
  * Make sure the alignment of the structure in the __tracepoints section will
  * not add unwanted padding between the beginning of the section and the
@@ -283,8 +270,6 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 				  "RCU not watching for tracepoint");	\
 		}							\
 	}								\
-	__DECLARE_TRACE_RCU(name, PARAMS(proto), PARAMS(args),		\
-			    PARAMS(cond))				\
 	static inline int						\
 	register_trace_##name(void (*probe)(data_proto), void *data)	\
 	{								\
@@ -375,8 +360,6 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 #define __DECLARE_TRACE(name, proto, args, cond, data_proto)		\
 	static inline void trace_##name(proto)				\
 	{ }								\
-	static inline void trace_##name##_rcuidle(proto)		\
-	{ }								\
 	static inline int						\
 	register_trace_##name(void (*probe)(data_proto),		\
 			      void *data)				\
diff --git a/include/trace/events/preemptirq.h b/include/trace/events/preemptirq.h
index 3f249e150c0c..f99562d2b496 100644
--- a/include/trace/events/preemptirq.h
+++ b/include/trace/events/preemptirq.h
@@ -43,8 +43,6 @@  DEFINE_EVENT(preemptirq_template, irq_enable,
 #else
 #define trace_irq_enable(...)
 #define trace_irq_disable(...)
-#define trace_irq_enable_rcuidle(...)
-#define trace_irq_disable_rcuidle(...)
 #endif
 
 #ifdef CONFIG_TRACE_PREEMPT_TOGGLE
@@ -58,8 +56,6 @@  DEFINE_EVENT(preemptirq_template, preempt_enable,
 #else
 #define trace_preempt_enable(...)
 #define trace_preempt_disable(...)
-#define trace_preempt_enable_rcuidle(...)
-#define trace_preempt_disable_rcuidle(...)
 #endif
 
 #endif /* _TRACE_PREEMPTIRQ_H */
@@ -69,10 +65,6 @@  DEFINE_EVENT(preemptirq_template, preempt_enable,
 #else /* !CONFIG_PREEMPTIRQ_TRACEPOINTS */
 #define trace_irq_enable(...)
 #define trace_irq_disable(...)
-#define trace_irq_enable_rcuidle(...)
-#define trace_irq_disable_rcuidle(...)
 #define trace_preempt_enable(...)
 #define trace_preempt_disable(...)
-#define trace_preempt_enable_rcuidle(...)
-#define trace_preempt_disable_rcuidle(...)
 #endif
diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index e37446f7916e..5c03633316a6 100644
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -15,20 +15,6 @@ 
 #define CREATE_TRACE_POINTS
 #include <trace/events/preemptirq.h>
 
-/*
- * Use regular trace points on architectures that implement noinstr
- * tooling: these calls will only happen with RCU enabled, which can
- * use a regular tracepoint.
- *
- * On older architectures, use the rcuidle tracing methods (which
- * aren't NMI-safe - so exclude NMI contexts):
- */
-#ifdef CONFIG_ARCH_WANTS_NO_INSTR
-#define trace(point)	trace_##point
-#else
-#define trace(point)	if (!in_nmi()) trace_##point##_rcuidle
-#endif
-
 #ifdef CONFIG_TRACE_IRQFLAGS
 /* Per-cpu variable to prevent redundant calls when IRQs already off */
 static DEFINE_PER_CPU(int, tracing_irq_cpu);
@@ -42,7 +28,7 @@  static DEFINE_PER_CPU(int, tracing_irq_cpu);
 void trace_hardirqs_on_prepare(void)
 {
 	if (this_cpu_read(tracing_irq_cpu)) {
-		trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1);
+		trace_irq_enable(CALLER_ADDR0, CALLER_ADDR1);
 		tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
 		this_cpu_write(tracing_irq_cpu, 0);
 	}
@@ -53,7 +39,7 @@  NOKPROBE_SYMBOL(trace_hardirqs_on_prepare);
 void trace_hardirqs_on(void)
 {
 	if (this_cpu_read(tracing_irq_cpu)) {
-		trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1);
+		trace_irq_enable(CALLER_ADDR0, CALLER_ADDR1);
 		tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
 		this_cpu_write(tracing_irq_cpu, 0);
 	}
@@ -75,7 +61,7 @@  void trace_hardirqs_off_finish(void)
 	if (!this_cpu_read(tracing_irq_cpu)) {
 		this_cpu_write(tracing_irq_cpu, 1);
 		tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
-		trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1);
+		trace_irq_disable(CALLER_ADDR0, CALLER_ADDR1);
 	}
 
 }
@@ -89,7 +75,7 @@  void trace_hardirqs_off(void)
 	if (!this_cpu_read(tracing_irq_cpu)) {
 		this_cpu_write(tracing_irq_cpu, 1);
 		tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
-		trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1);
+		trace_irq_disable(CALLER_ADDR0, CALLER_ADDR1);
 	}
 }
 EXPORT_SYMBOL(trace_hardirqs_off);
@@ -100,13 +86,13 @@  NOKPROBE_SYMBOL(trace_hardirqs_off);
 
 void trace_preempt_on(unsigned long a0, unsigned long a1)
 {
-	trace(preempt_enable)(a0, a1);
+	trace_preempt_enable(a0, a1);
 	tracer_preempt_on(a0, a1);
 }
 
 void trace_preempt_off(unsigned long a0, unsigned long a1)
 {
-	trace(preempt_disable)(a0, a1);
+	trace_preempt_disable(a0, a1);
 	tracer_preempt_off(a0, a1);
 }
 #endif
diff --git a/scripts/tags.sh b/scripts/tags.sh
index 191e0461d6d5..0d01c1cafb70 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -152,9 +152,7 @@  regex_c=(
 	'/^BPF_CALL_[0-9]([[:space:]]*\([[:alnum:]_]*\).*/\1/'
 	'/^COMPAT_SYSCALL_DEFINE[0-9]([[:space:]]*\([[:alnum:]_]*\).*/compat_sys_\1/'
 	'/^TRACE_EVENT([[:space:]]*\([[:alnum:]_]*\).*/trace_\1/'
-	'/^TRACE_EVENT([[:space:]]*\([[:alnum:]_]*\).*/trace_\1_rcuidle/'
 	'/^DEFINE_EVENT([^,)]*,[[:space:]]*\([[:alnum:]_]*\).*/trace_\1/'
-	'/^DEFINE_EVENT([^,)]*,[[:space:]]*\([[:alnum:]_]*\).*/trace_\1_rcuidle/'
 	'/^DEFINE_INSN_CACHE_OPS([[:space:]]*\([[:alnum:]_]*\).*/get_\1_slot/'
 	'/^DEFINE_INSN_CACHE_OPS([[:space:]]*\([[:alnum:]_]*\).*/free_\1_slot/'
 	'/^PAGEFLAG([[:space:]]*\([[:alnum:]_]*\).*/Page\1/'